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Finding the Fourth Proportional to 1,494.78, 2,242.17 and 399.15

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Solution

The fourth proportional to 1,494.78, 2,242.17 and 399.15 is: 598.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,494.78 : 2,242.17 = 399.15 : x
  2. Step 2: Convert to fraction form
    1,494.78/2,242.17 = 399.15/x
  3. Step 3: Cross multiply
    1,494.78x = 2,242.17 × 399.15
  4. Step 4: Simplify right side
    1,494.78x = 894,962.16
  5. Step 5: Solve for x
    x = 894,962.16/1,494.78
  6. Step 6: Final answer
    x = 598.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.